Do you have trouble sleeping at night? Do you have a massive proliferation of -if- statements designed to check that all is well in the world? Have I got a product for you! And what a price, only $9.95. Please address all checks to: Me.
Err, right. -assert- is a simple command. Give it a logical statement (like you would an if option), and it will make your program fail if it's not true. Easy error checking. Now you can sleep.